The paper presents an innovative GNSS fault detection and exclusion approach for the adoption of satellite localization in the rail sector. Current global integrity monitoring systems cannot guarantee the safety level needed for such applications as train control where Tolerable Hazard Rate in the order of 10$^-9/h$ is required. A new method, named 2-tiers, enabling to integrate local augmentation systems and global augmentation infrastructures, is presented. It is based on the comparison of single differences residuals among satellites for detecting signal in space faults and double difference residuals among local augmentation stations and SBAS RIMS for detecting reference stations faults. GPS SIS faults described in literature and real GNSS raw data recorded on a train are taken into account. The present work reports the performance analysis for the 2-tiers approach carried out during relevant European projects. A Test-Bed architecture has been developed through the implementation of the algorithm in real-time on a local augmentation operational centre. Relevant performances have been tested on a rail track for validating the algorithm in real operative conditions. Significant results of the analysis are reported for SIS integrity assessment only.
Stallo, C., Neri, A., Salvatori, P., Capua, R., Rispoli, F. (2019). GNSS Integrity Monitoring for Rail Applications: 2-tiers method. IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 55(4), 1-1 [10.1109/TAES.2018.2876735].
GNSS Integrity Monitoring for Rail Applications: 2-tiers method
Neri, Alessandro;Salvatori, Pietro;
2019-01-01
Abstract
The paper presents an innovative GNSS fault detection and exclusion approach for the adoption of satellite localization in the rail sector. Current global integrity monitoring systems cannot guarantee the safety level needed for such applications as train control where Tolerable Hazard Rate in the order of 10$^-9/h$ is required. A new method, named 2-tiers, enabling to integrate local augmentation systems and global augmentation infrastructures, is presented. It is based on the comparison of single differences residuals among satellites for detecting signal in space faults and double difference residuals among local augmentation stations and SBAS RIMS for detecting reference stations faults. GPS SIS faults described in literature and real GNSS raw data recorded on a train are taken into account. The present work reports the performance analysis for the 2-tiers approach carried out during relevant European projects. A Test-Bed architecture has been developed through the implementation of the algorithm in real-time on a local augmentation operational centre. Relevant performances have been tested on a rail track for validating the algorithm in real operative conditions. Significant results of the analysis are reported for SIS integrity assessment only.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
